Bump version to 3.1.0

Executed ./scripts/bump_version.sh --version 3.1.0 --so-crypto 11 --so-tls 17
+ fix of build_info.h

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd990ab..6debe35 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -333,7 +333,7 @@
 write_basic_package_version_file(
     "cmake/MbedTLSConfigVersion.cmake"
         COMPATIBILITY SameMajorVersion
-        VERSION 3.0.0)
+        VERSION 3.1.0)
 
 install(
     FILES "${CMAKE_CURRENT_BINARY_DIR}/cmake/MbedTLSConfig.cmake"